Vacuum chuck for bearing cones



7 1 927 w. A. HATCHER VACUUM CHUCK FOR BEARING CONES Filed Nov. 12, 1924 ing points F, preferably three in number.

Patented Feb. 22, 1927.

UNITED S ATES PATENTVOFFICE.

\VILLIAM ALBERT Hawaiian, or'nn'rnorr, MICHIGAN, ASSIGNOR '10 CRESCENT rulvrr COMPANY, or DETROIT, MICHIGAN, A CORPORATION or MICHIGAN.

VACUUM CHUCK FOR BEARING CONES.

Application filed November 12-, 1924. Serial No. 749,553.

The invention relates to vacuum chucking fixtures and is particularly concerned with an apparatusrfor mounting tapered roller bearing cones upon a rotatable arbor insuch a manner as to be accurately 'centered'and firmly clamped while grinding the cylindrical hole therein.

provide a vacuum operated fixture which willpermit quick and accurate mounting of the cones upon the rotary'arbor so as to cut down the time loss in chucking.

()ther objects reside in the more specific details ot construction as hereinafter fully set forth and illustrated ing drawings wherein: V

Figure 1 is a longitudinal section through the chuck; Y 1 p p Figure 2 is an endelevat-i'on thereof partly insection taken on the line 22 of Figure 1. The vacuumchuck comprises a rotatable arbor A adapted to ,be suitably secured in a grinding machine or other rotating mechanism and provided with an interior bore A adapted to be connected to a suitable source of high vacuum (not shown). The arbor is provided with a head portion B suitably example,- by the securedthereto, for v r The head B has threaded connection 13.

the shoulders B engaging the flange A of formed .by the boreC and'being held in position by the vacuum maintained in the annular space C in the rear of said insert.

E is a sleeve having a sliding fit on the hub G and provided with the laterally'extending annular flange E at one end there of and the inwardly projecting flange E at the opposite end thereof The sleeve has a cylindrical inner surface E for receiving a sliding centering ring F, the latter being provided with inwardly extending center- G is a coil spring arranged between the I flange E and the ring F for yleldingly urging the latter into engagement with the con ioal surface of the bearing cone H. With this arrangement the bearing cone "maybe inserted. in the sleeve-E while the latter is in the accompany- 7 The grinder wheel may ,lng cone H is clamped between the insert D and the flange E I is a'set screw inserted through the sleeve E having the inner projecting portion 1 arranged to limit the The primary object of the invention is to movement of-the centering ring so as to prevent the latter from talling out of the sleeve, upon the removal of the same.

For holding the sleeve to the arbor head and clamping for hearing cone in position there is an annular vacuum cup J arranged to form a sealing contact with the annular flange E and toevacuate the air adjacent to said flange through the vacuum passageways K and K leading to the central bore A of the arbor. In forming the vacuum cup J, the head B is preferably provided with the grooved recess L having sloping sides L and a sheet of gum rubber or other suitable resilient material is arranged in said recess and clamped thereto by the ringshaped clamp M and the clamping screws M. The marginal portions N of the gum rubber sheet are thus brought into contact with the annular flange E and upoirthe connection of-the arbor to a vacuum source is firmly clamped. I I i then be brought into engagement with the inner surface of I the sleeve is drawn inwardlyupon the hub C until the work piece or bearing cone H the bearing cone in order to grind the same and to prevent interference the insertD has a" recess D therein a slightly larger diameter than the hole inv the bearing cone.

One of the advantages of the fixture as above described is that there is a constant pressure upon the bearing cone holding. the

same in position as long as the vacuum remains constant and this is independent of any variation of the length of the work piece. Another advantage of the apparatus is that the clamping is effected by merely applying the vacuum to the apparatus which may be accomplished by meansof a suitable controlling valve.

In removing the article from the chuck,

the controlling valve is turned to cut oflt the vacuum supply and vent the vacuum cups to the atmosphere'as will be readily under-- stood whereupon the sleeve may be with-, V

drawn from the hub C. The sleeve has a t close sliding fit upon the hub G and to prcvent the possibility oil? a vacuum being maintained in the recess 0 adjacent the vacuum cup J by reason of the close lit, the head is provided with an air vent l which prevents the building up of a vacuum in said recess.

What I claim as my invention is:-

1. A rotary vacuum chuck comprising a rotatable body having a seat for receiving the work piece, a work clan'iping sleeve slidable on said body and adapted to cho e the work piece, and vacuum means on said chuck adapted to hold said sleeve in position to securely clamp said work piece between said seat and said sleeve.

2. A rotary vacuum chuck comprising an arbor, a work clamping sleeve longitudinally slidable thereon having an outwardly extending annular flange, a for the work iece within said sleeve, inward projections in said sleeve spaced from said seal to rcceive and clamp a work piece iherebetween, and vacuum means on said chuck contacting with said annular flange to securely hold said sleeve in work clamping position.

3. A rotary vacuum chucr for hearing cones comprising an arbor having a projecting cylindrical end portion, work clamping sleeve slidahle on said end portion provided with an annular flange, an an nular vacuum cup secured to said arbor contacting with said flange to securely hold said sleeve in work clamping position, a seat on said arbor within said sleeve, an abutment upon said sleeve spaced from said arbor to recelve and clamp a bearing cone therebetween, and i means for automatically centering said bearing cone within said sleeve. p

4. A rotary vacuun'i chuck comprising a rotatable arbor, a work clamping sleeve longitudinally slidable thereon, provided with means for engaging the work piece to clamp the same against said arbor, and vacuum means for securely holding said sleeve in work clamping position.

5. A rotary vacuum chuck comprising a rotatable arbor. a work clan'iping slecve longitudinally slidable thereon provided with means for engaging the work piece to clamp the same against said arbor, vacuum means for securely holding said sleeve in work clamping position, and means for centering the work within said sleeve.

is. A rotary vacuum chuck for hearing cones comprising an arbor having a project inn cylindrical hub, a work clamping sleeve nular flange, an annular vacuum cup secured io said arbor contacting with said flange to securely hold said sleeve in work clamping posul'ion a seat on said. arbor within said sleeve, an abutment upon said sleeve spaced {ruin said seat to receive and clamp a hearing conetherebetwecu, a ring within said sleeve having projecting centering points, and a spring between said ring and the abutineiu; on said sleeve.

'7. A rotary vacuum chuck for supporting bearing cones and the like comprising an arbor having a hub, a work clamping sleeve longiliiulinally slidable on said hub, means carried by said sleeve for centering a bearing cone, abutments on said sleeve and said arbor for clamping the bearing cone therebetween, a vacuum cup arranged to form a sealing eneinent with said sleeve, and vacuum paseways leading to said vacuum cup.

5%. A rotary vacuum chuck comprising an arbor having a head portion provided with a projecting hub, a clamping member longitudinally slidable on said hub, means upon idable on said hub provided with an ansaid clanuping member for centering the j work piece thereon, and a "acuum cup arranged to form a sealing engagement with said. sleeve to securelyhold said sleeve in work clamping position.

9. A rotary vacuum chuck comprising an arbor hav a hub projecting therefronua member insert: able within said hub having a seat for receiving one end of a bearing cone, a work clamping sleeve longitudinally slidable on said hub and having an abutment :ifor eng aving the opposiie end of said bearii fconer a ring slidablewithin said sleeve and having inwardly projecting centering points for engaging the conical surface of the bearing cone, a spring disposed between the said ring and said 2ti)llilll0l1i-,i1llcl a vacuum cup on said arbor arranged to form a vacuum seal with said sleeve to securely hold said sleeve in work clanipii'ig position.

In testimony whereof I aihx my signature.

WILLIAM ALBERT HAICHER. 

